During your study of T215B, you have been introduced to a set of concepts, protocols and threats to network security. Using your own words, write a summary about network security explaining the following factors: a. Explain the basic idea about IPsec protocol, its aim and disadvantages. b. Do a comparison between Caesar cipher using diagraph coding and Vigenère Cipher in terms of their operation and level of security. c. Explain the Message Digest Algorithm 5 (MD5) and describe briefly its operation.

During your study of T215B, you have been introduced to a set of concepts, protocols and threats to network security. Using your own words, write a summary about network security explaining the following factors: a. Explain the basic idea about IPsec protocol, its aim and disadvantages. b. Do a comparison between Caesar cipher using diagraph coding and Vigenère Cipher in terms of their operation and level of security. c. Explain the Message Digest Algorithm 5 (MD5) and describe briefly its operation.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

. Consult the MIME RFC to find out how base64 encoding handles binary data of a length not evenly divisible by three bytes. The POP3 Post Office Protocol only allows a client to retrieve email, using a password for authentication. Traditionally, to send email a client would simply send it to its server (using SMTP) and expect that it be relayed. (a) Explain why email servers often no longer permit such relaying from arbitrary clients. (b) Propose an SMTP option for remote client authentication. (c) Find out what existing methods are available for addressing this issue.
Consider an IP datagram with the following characteristics: Length of IP header: 20 bytes Total length of IP datagram: 1000 bytes DF flag 0 MF flag 0 Fragment offset 0 Suppose this datagram must be transmitted on a network where the (a) Explain why this IP datagram must be fragmented. How many fragments will be created? (b) After the fragmentation is performed, provide the value of the following fields for each of the fragments: (12 M) -Total length (in bytes) - Value of DF flag - Value of MF flag - Value of Fragment offset (as a decimal number) (c) What does a router do, if the value of the DF flag of an IP datagram is set to one? (4)
In what kinds of situations may using SSH prove to be helpful? The decision to include SSHS on the list of protocols has been the subject of much discussion.
Please explain how to solve the problem in an easy-to-understand way
This question concerns block cipher padding. Suppose the block cipher has a block size of 16 bytes. A certain message ends with a block which is 16 bytes. We must reversibly pad out the message to use some block cipher modes, such as CBC (even if the last block is full, which it is in this case). Consider the following padding strategy. Append a single byte with value 128, and then as many zero bytes as required to make the overall length a multiple of 16. Suppose the final (possibly partial) block of the message is "Ox000102030405060708090a0b0c hехad mal. Write out the complete hal block in hexadecimal. Please do not put a leading Ox as this has been written already. Because the last block is actually full, the block you add will need to be a completely new block. Ох
For what kinds of tasks and in what ways may SSH be used? How do the SSH protocols work, and what are they?
What function does the MAC serve during the TLS exchange with a different cipher spec?
It is imperative to maintain awareness of the port numbers associated with the FTP protocol. The notion that FTP transmits control data "out of band" is a widely held belief. However, it is necessary to investigate whether this assertion is accurate.
It is important to keep in mind that the TCP/IP protocol suite's transport phase is where packet reassembly and reordering occurs. A firewall may function at the Internet or data layer level of abstraction. Whether the traffic stream is in the correct sequence or has been erased, a stateful inspection barrier cannot learn anything about it.
What is the difference between TCP and UPD session hijacking?
What is traffic analysis for a network? Is there any relationship between the network traffic and the cryptographic key used (by nodes) for a communication? For instance, let us consider that five nodes have several keys in common. They are now communicating over a network. Given this scenario, write some paragraphs about your understanding why or why not the keys would affect the traffic analysis.
Network Security